lighthouse/eth2/utils/tree_hash_derive/tests/tests.rs

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use cached_tree_hash::{CachedTreeHash, TreeHashCache};
use tree_hash::{merkle_root, SignedRoot, TreeHash};
use tree_hash_derive::{CachedTreeHash, SignedRoot, TreeHash};
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#[derive(Clone, Debug, TreeHash, CachedTreeHash)]
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pub struct Inner {
pub a: u64,
pub b: u64,
pub c: u64,
pub d: u64,
}
fn test_standard_and_cached<T: CachedTreeHash>(original: &T, modified: &T) {
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// let mut cache = original.new_tree_hash_cache().unwrap();
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let mut cache = TreeHashCache::new(original).unwrap();
let standard_root = original.tree_hash_root();
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let cached_root = cache.tree_hash_root().unwrap();
assert_eq!(standard_root, cached_root);
// Test after a modification
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cache.update(modified).unwrap();
let standard_root = modified.tree_hash_root();
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let cached_root = cache.tree_hash_root().unwrap();
assert_eq!(standard_root, cached_root);
}
#[test]
fn inner_standard_vs_cached() {
let original = Inner {
a: 1,
b: 2,
c: 3,
d: 4,
};
let modified = Inner {
b: 42,
..original.clone()
};
test_standard_and_cached(&original, &modified);
}
#[derive(Clone, Debug, TreeHash, CachedTreeHash)]
pub struct Uneven {
pub a: u64,
pub b: u64,
pub c: u64,
pub d: u64,
pub e: u64,
}
#[test]
fn uneven_standard_vs_cached() {
let original = Uneven {
a: 1,
b: 2,
c: 3,
d: 4,
e: 5,
};
let modified = Uneven {
e: 42,
..original.clone()
};
test_standard_and_cached(&original, &modified);
}
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#[derive(Clone, Debug, TreeHash, SignedRoot)]
pub struct SignedInner {
pub a: u64,
pub b: u64,
pub c: u64,
pub d: u64,
#[signed_root(skip_hashing)]
pub e: u64,
}
#[test]
fn signed_root() {
let unsigned = Inner {
a: 1,
b: 2,
c: 3,
d: 4,
};
let signed = SignedInner {
a: 1,
b: 2,
c: 3,
d: 4,
e: 5,
};
assert_eq!(unsigned.tree_hash_root(), signed.signed_root());
}
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#[derive(TreeHash, SignedRoot)]
struct CryptoKitties {
best_kitty: u64,
worst_kitty: u8,
kitties: Vec<u32>,
}
impl CryptoKitties {
fn new() -> Self {
CryptoKitties {
best_kitty: 9999,
worst_kitty: 1,
kitties: vec![2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43],
}
}
fn hash(&self) -> Vec<u8> {
let mut leaves = vec![];
leaves.append(&mut self.best_kitty.tree_hash_root());
leaves.append(&mut self.worst_kitty.tree_hash_root());
leaves.append(&mut self.kitties.tree_hash_root());
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merkle_root(&leaves)
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}
}
#[test]
fn test_simple_tree_hash_derive() {
let kitties = CryptoKitties::new();
assert_eq!(kitties.tree_hash_root(), kitties.hash());
}
#[test]
fn test_simple_signed_root_derive() {
let kitties = CryptoKitties::new();
assert_eq!(kitties.signed_root(), kitties.hash());
}
#[derive(TreeHash, SignedRoot)]
struct Casper {
friendly: bool,
#[tree_hash(skip_hashing)]
friends: Vec<u32>,
#[signed_root(skip_hashing)]
dead: bool,
}
impl Casper {
fn new() -> Self {
Casper {
friendly: true,
friends: vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
dead: true,
}
}
fn expected_signed_hash(&self) -> Vec<u8> {
let mut list = Vec::new();
list.append(&mut self.friendly.tree_hash_root());
list.append(&mut self.friends.tree_hash_root());
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merkle_root(&list)
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}
fn expected_tree_hash(&self) -> Vec<u8> {
let mut list = Vec::new();
list.append(&mut self.friendly.tree_hash_root());
list.append(&mut self.dead.tree_hash_root());
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merkle_root(&list)
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}
}
#[test]
fn test_annotated_tree_hash_derive() {
let casper = Casper::new();
assert_eq!(casper.tree_hash_root(), casper.expected_tree_hash());
}
#[test]
fn test_annotated_signed_root_derive() {
let casper = Casper::new();
assert_eq!(casper.signed_root(), casper.expected_signed_hash());
}